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Project title: |
Starling Bank Payment Integration in Payroll App
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Posted by: |
External project from PeoplePerHour
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Started: |
02-Mar-2026 14:06 GMT |
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Description: |
Good — here is the revised **Starling integration fixed-price spec**, tightened and now explicitly referencing:
* Your defined internal interfaces / APIs
* GitHub workflow
* Your stack and architecture constraints
You can repost this exactly.
---
# Fixed Price Project – Starling Bank Business API Integration (PHP)
## ⚠️ Fixed Price Only
This is a clearly scoped integration project.
Provide:
* Total fixed price
* Delivery timeline (weeks)
* Milestone breakdown
No hourly proposals.
---
# Project Overview
We operate a UK CIS payroll platform (PayCIS) built in:
* PHP 8+
* MySQL (relational, indexed)
* Object-Oriented architecture
* MVC-style request framework
* Strict naming conventions
* TLS-only environment
* Subdomain-based routing
* Role-based permissions
The system already:
* Calculates subcontractor net payments (CIS + VAT handled)
* Stores validated bank details
* Generates structured bulk payment lists
* Manages payment lifecycle:
* For Approval
* To Be Paid
* Paid
* Maintains full audit logging
* Uses defined internal service classes for payments
We now require **direct integration with Starling Bank Business API**.
---
# Important Architecture Note
We already have:
* A cleanly defined internal payment interface
* Clear service-layer APIs for retrieving payable batches
* Structured payment models
* Consistent database schema
The integration must plug into our existing payment service layer —
**not bypass it or rewrite core logic.**
This is an API integration project, not a system redesign.
---
# Scope of Work
## 1️⃣ Starling API Client
Build a reusable, clean OOP Starling client:
* OAuth authentication
* Secure token storage
* Automatic refresh handling
* Sandbox + live configuration
* No hardcoded credentials
* Environment-driven config
Deliverable:
* `starling_api.class.php` (or equivalent clean service class)
* Fully documented
---
## 2️⃣ Bulk Payment Submission
Using our existing internal API:
* Fetch payments marked “To Be Paid”
* Submit via Starling Faster Payments API
* Use idempotency keys
* One batch or controlled sequential processing
Each payment includes:
* Recipient name
* Account number
* Sort code
* Amount (2 decimal precision)
* Unique internal reference
Deliverable:
* Method to send payment batch
* Clean separation between:
* Data retrieval
* API payload generation
* Submission logic
---
## 3️⃣ Payment Status Handling
System must:
Store per-payment:
* Starling transaction ID
* Status (pending / completed / failed)
* Failure reason
* Timestamp
Update internal status accordingly.
Database changes allowed if necessary, but must follow our schema conventions.
---
## 4️⃣ Webhook Handling (If Supported)
* Implement secure webhook endpoint
* Signature verification
* Map webhook status → internal payment state
* Log raw webhook payload
Deliverable:
* Controller endpoint
* Webhook log table
* Replay-safe handling
---
## 5️⃣ Minimal Admin UI Additions
Add to existing admin interface:
* “Send to Starling” action
* Starling reference display
* Live payment status display
* Error feedback
No UI redesign required.
---
## 6️⃣ Logging Requirements
Create structured logs for:
* API requests
* API responses
* Webhooks
* Failures
* Initiating user
Logs must include:
* Payload
* Response
* Timestamp
* Account ID
* User ID
Must follow existing audit log conventions.
---
# Development Standards
You must adhere to:
* OOP principles
* DRY
* No deprecated PHP
* No inline SQL
* Clean separation of concerns
* Strict naming conventions
* Existing schema standards
All code must:
* Be production ready
* Include basic inline documentation
* Pass linting
* Follow consistent formatting
---
# GitHub Requirement
All development must be:
* Submitted via GitHub
* Branch-based workflow
* Pull request for review
* No direct server edits
* No ZIP file delivery
Commit history must be clean and logical.
---
# Security Requirements
* TLS only
* Encrypted token storage
* Idempotency protection
* No double-pay risk
* Strict input validation
* No credentials in frontend
* Webhook verification mandatory
---
# Out of Scope
* Multi-bank support
* Open Banking aggregation
* Refund flows
* International payments
* Credit card processing
* Accounting integrations
Starling Business API only.
---
# Deliverables
* Working Starling sandbox integration
* Production-ready live configuration
* Updated schema script (if required)
* Clean Starling API service class
* Webhook controller
* Updated admin UI integration
* Deployment instructions
* GitHub PR submission
Proposal Must Include
1. Fixed total price
2. Timeline (weeks)
3. Confirmation of:
Starling API experience
OAuth implementation
Webhook handling
Fintech or banking integrations
Examples of similar API integrations |
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Project ID:
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3472057 |
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Project category: |
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Project budget: |
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